Window ventilating-lock.



PATENTED AUG. 2

H; B. IVES.

WINDOW VENTILATING LOCK.

APPLICATION FILED JUNE 17, 1903- H0 MODEL.

PM w I nventor.

Attorney Witnesses afl'wzzM UNITED STATES Patented August 2, 1904.

I'I(, )BAR'I. B. IVES, OF NE\V HAVEN, CONNEUTOUT.

WINDOW VENTlLATING-'-LOCK.

SPECIFICATION forming part of Letters Patent No 766,357, dated August 2, 1904.

Application filed June 17,1903. Serial No; 161,848. (No model.)

To (all whom it Hwy 0017106777,:

Be it known thatl, HOBART B. Ivns, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in \Vindow Ventilating-Locks, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to new and useful improvements in window ventilating-locks, and has for its object, among other things, the construction of a simple device which will require the least possible space upon the window-sash, to provide the same with a friction-knob, as well as to make the lock neat and pleasing in appearance and of simple design, which can be economically constructed and sold at the minimum cost.

To these and other ends my invention consists in the window ventilating-lock having certain details of construction and combination of parts, as will be hereinafter described, and more particularly pointed out in the claims.

Referring to the drawings, in which like numorals of reference designate like parts in the several iigu res,Figu re 1 is a fragmentary front elevation of the upper and lower sash of a window with my improved ventilating-lock attached thereto. Fig. 2 is a side elevation of the lock-plate. Fig. 3 is a side elevation of the strike-plate. Fig. & is a sectional plan view of the lock, taken upon line A B of Figs. 1 and 2. Fig. 5 is a front elevation of a modified form of lock-plate, and Fig. 6 is an elevation of a modified form of knob.

In carrying out my invention 1 provide a lockplate 1, having an inwardly-turned lip 2 upon one end thereof and a longitudinal slot 3 therethrough, said slot terminating adjacent to either end of said plate. This plate is preferably constructed with inwardly turned flanges f, so as to provide a recess beneath the body of the plate. Slidably mounted within said slot 3 is the knob mechanism, which comprises a knob 5 upon the front side of said plate, having a recess 6 therein, a block 7, having a chambered shank 8 thereon, which projects through the slot 3 and into the recess 6,

holding said knob in any position within the slot 3 by frictional engagement, the pressure of the spring being suflicient to hold said knob against accidental movement and at the same time permitting it to be moved manually. I prefer the form of knob mechanism above described; but a knob similar to the one shown in Fig. 6, in which the knob 5 is provided with a shank 11, which passes through the slot 3 and upon the end of which is pivoted a washer 12, can be used equally as well. If this form of knob mechanism is used, I prefor to provide a notch 13 in both ends of the slot 3, so that the shank of the knob 5 will drop into said notch at the two extreme positions thereof and hold it against accidental movement lengthwise therein.

My lock is attached to the side rail 14: of the upper sash, with the lip 2 thereof engaging the inner face of said side rail and there held by screws 15, and upon the top rail 16 of the lower sash 1 preferably secure a strike-plate 17. \V hen it is desired to lock the sashes, so that either the lower or upper sash may be open to a limited extent, the knob is brought to the position shown in Figs. 1 and 2, in which position the knob will engage the strike-plate 17 and permit the window to be opened the distance between the top of the strike-plate and the bottom of the knob. By shifting the position of the knob in the slot 3, so that it assumes the position shown by broken lines in Fig. 1, the sashes will pass each other and the window be fully opened.

In the drawings 1 have shown the look as being attached to the upper sash adjacent to the lower rail thereof; but it is apparent, of course, that it can be secured to the side rail in any intermediate position between the top and bottom rails, and thereby permit the window to be opened to a greater or less extent. it is also apparent that while 1 have shown my device as attached to the left side rail of the sash it may be applied also to the right side rail, the construction of the lock being such that it can be used either as a right or left hand lock.

There are many minor changes and alterations that can be made within my invention aside from those herein shown and suggested,

' and I would therefore have it understood that I do not limit myself to the exact construction herein shown and described, but claim all that falls fairly within the spirit and scope of my invention.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a device of the character described, the combination of a lock-plate provided with a substantially rectangular body portion, and an outwardly projecting curved lip portion formed integral therewith, there being provided a continuous slot extending from the body portion and the lip, said body portion being further provided with perforations for receiving an attaching means, a marginal flange integral with and depending from the lip and body portion of the lock-plate, and a slidable block provided with a chambered shank disposed beneath the body of the lockplate, the shank projecting through the slot thereof, and a knob connected with said block and adapted to receive the chambered shank thereof, being provided with means for frictionally securing the knob in any desired position within the slot of the lock-plate, substantially as described.

2. In combination with a lock-plate comprising a rectangular top portion, an outwardly-projecting curved portion formed integral therewith having a slot therein extending therethrough and into the body portion, a continuous marginal flange depending from and extending around the body and lip portion of said lock-plate, a frictional block having a chambered shank mounted beneath said plate, the shank thereof extending upwardly through the continuous slot therein, a knob secured to the said shank, and means for forcing the same into frictional engagement with the lock-plate, substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

HOBART B. IVES.

Witnesses:

GEORGE E. HALL, WALLACE S. MOYLE. 

